56589021 has 12 divisors (see below), whose sum is σ = 83949372. Its totient is φ = 36706176.

The previous prime is 56589017. The next prime is 56589023. The reversal of 56589021 is 12098565.

It is a happy number.

56589021 is a `hidden beast` number, since 56 + 589 + 0 + 21 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 39200121 + 17388900 = 6261^2 + 4170^2 .

It is not a de Polignac number, because 56589021 - 2² = 56589017 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56589023) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 84636 + ... + 85301.

It is an arithmetic number, because the mean of its divisors is an integer number (6995781).

Almost surely, 2^56589021 is an apocalyptic number.

It is an amenable number.

56589021 is a deficient number, since it is larger than the sum of its proper divisors (27360351).

56589021 is a wasteful number, since it uses less digits than its factorization.

56589021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 169980 (or 169977 counting only the distinct ones).

The product of its (nonzero) digits is 21600, while the sum is 36.

The square root of 56589021 is about 7522.5674473547. The cubic root of 56589021 is about 383.9229378237.

The spelling of 56589021 in words is "fifty-six million, five hundred eighty-nine thousand, twenty-one".